The Battle of Assandun is fought between Danish and English armies on October 18, 1016.

There is disagreement whether Assandun may be Ashdon near Saffron Walden in north Essex or, as long supposed, Ashingdon near Rochford in southeast Essex, England.

It is a victory for the Danes, led by Canute the Great (Cnut, Knut or Knud), who triumphsover the English army led by King Edmund II ('Ironside').

The battle is the conclusion to the Danish reconquest of England.